Apparatus for continuous distillation and deodorization



April 27, 1937. P. L. FAUTH 2,073,841

APPARATUS FOR CONTINUOUS DISTILLATION AND DEODORIZATIOR Filed June 14. 1953 2 Sheets-Sheet 1 Mxrunz SuPPL Y EIIEI q Vacuum PRA-SSURE Pl/Mp REGULHI'OI? DE'ODOR/ZER Elva/151x 05? I 1 (m/Mm.

April 27, 1937. FAUTH 2,078,841

APPARATUS FOR CONTINUOUS DISTILLATION AND DEODORIZATION Filed June 14', 1953 2 Sheets-Sheet 2 Mxn/RE JUPPLY PRESSURE fizauzfiralr Fer-tented Apr. 27, 1937 PATENT OFFICE APPARATUS FOR CONTINUOUS DISTILLA- TION AND DEODORIZATION Philipp Lorenz Fauth, Wiesbaden-Dotzheim, Germany, assignor to Gesellschaft zur Verwertung Fauthscher Patente m. b. 11., Wiesbaden, Germany, a company of Germany Application June 14, 1933, Serial No. 675,842 In Germany June 30, 1932 2 Claims.

The objects of this inventionare to carry out the two operations, i. e.,the distillation of mixtures of solvent and oils and fats and deodorization of oils and fats, hitherto carried out sepa- 10 ing the mixture to flow in a relatively thin layer rately, in one continuous operation, to overcome the faults of the known methods of operation hitherto existing and to make the working process considerably more economical.

The process of this invention comprises allowover a considerably curved heated surface, for example the outer wall of a steam drum constructed in the form of a round container, whereby the main quantity of the solvent is evaporated from the mixture. The round container is so built into a receiving container that an annular space is formed between the two containers, through which steam flows in countercurrent to the mixture fiowing down in a state of very fine distribution over the heated surface, which steam takes up the residues of solvent still contained in the oil.

The steam, employed for expelling the solvent residues, before it arrives at the part of the apparatus serving for the distillation, has, according to the invention, likewise in countercurrent, taken up the substances of undesirable taste and odour from the oil flowing out from the distillation zone of the apparatus.

The vapours sucked out of the part of the apparatus serving for the deodorization are thereby simultaneously usedfor the pre-deodorizing and for the following distillation, whilst the whole of the discharging vapours and gases are employed for preheating the mixture.

This preheating is known per se in the distillation of mixtures; it was, however, hitherto not possible to employ the vapours discharging during the separately carried outdeodorizing process for distillation purposes and then to utilize them together with the distilled off gases entirely for preheating the mixture.

It is also of importance that by the combination of the deodorizing process with the distillation process the amount of heat which is employed in the deodorizing of the oil is saved, since the subsequent distillation with the sucked out deodorizing vapours initiates the deodorizing process and the oil reaches the deodorizing apparatus at a high temperature, This represents a considerable economy in the expenditure of heat.

The mixture and the oil according to the process of the inventionv are distributed over the heating surfaces with the aid of a suitable dis-v tributing channel, which is disposed centrally above the steam drum. By this arrangement, incrustation of the heating surfaces is avoided owing to the continuous inlet and discharge The further advantage is also obtained that the mixture at the commencement of the distillation first moves in a slow stream in a state of fine distribution over the surface, so that the main quantity of the solvent is vaporized on the upper-surface of the steam drum and the gases are easily drawn off.

The heating of the steam drums is with advantage effected by the hot deodorized oil discharging at about 160 C. which at the same time offers the advantage that the oil itself in this manner undergoes cooling to about 90 C. In order further to utilize this heat the oil can be passed through a mixture-preheater.

Both the distillation apparatus and the deodorizing apparatus are with advantage composed of several heating elements superimposed one above the other in order to effect as complete an action as possible.

Since the deodorizing apparatus is under vac uum a regulator known per se is built in the lead between the same and the distilling apparatus, which renders it possible for the oil to pass over without breaking the vacuum. A pump built in the lead serves to convey the vapours from the deodorizing apparatus to the distilling apparatus.

An embodiment of apparatus suitable for carrying out the process of the invention is shown diagrammatically and by way of example in the accompanying drawings in which Fig. 1 is a front elevation, partly in section, and Fig. 2 an and elevation, partly in section.

The mixture is introduced into the elevated container 11, from which it flows through the lead b into the condenser c (mixture-preheater). Discharge from this preheater takes place at the top through the lead d, which leads to the distributing channel e1 for the mixture. This distributing channel er is disposed above the inner container f1, constructed in the form of a steam drum, which is so disposed in the container 01, that an annular space hl is formed between the two containers. The mixture flows from the distributing channel e1 over the heated curved wall i through the space In into the cylindrical container 11 in which the steam nozzle m1 is disposed. The oil flows through the lead 11; to the distribut ing channel 82 of a second apparatus arranged in the same manner.- The overflow of the oil from h to e: is so ,regulated by correspondingly forming the lead m that the container 11 and the space In always remain full of oil. In the second I disposed thereunder.

' be maintained under vacuum, a regulator is constructed in the lead 11:, which renders the inlet or the oil possible, whilst keeping the vacuum zone closed. The above described procedure is repeated in the following apparatus. The hot steam required for the deodorizing process passes through the lead in into the nozzle m5 of the lowest apparatus flows through the oil disposed in the container l5 and space 765, then sweeps in the annular space hs'over the oil flowing over the curved wall is and passes through the steam connections in and in into the two apparatus disposed above the same and here in like manner comes into the most intimate contact in countercurrent for the purpose of effecting deodorization. The two apparatus are arranged in the same manner as that described above, so that individual explanations are not necessary.

The vapours are sucked out of the uppermost of the three lower apparatus throughthe lead 212 by a vacuum pump q and forced into the nozzle m2 of the next apparatus. A regulator r can be built in the lead n in front of the vacuum pump q, which renders it possible to operate according to the process or German specification No. 532,428. The steam entering the nozzle m2 flows through the oil in the container 12 and the space 762, sweeps over the outer walls is of the steam drum is and enters through the lead 291 into the uppermost apparatus, where the path of the steam just described is repeated. The steam then passes together with the distilled gases through the discharge lead 1) to the condenser c. The finished deodorized oil discharges from the lead of the lowest apparatus; the vacuum zone is closed by the oil discharging regulator s. The hot steam enters at t1, ta, ta, t4 and t5 and the water of condensation discharges at in, its, us, u; and us.

It should be understood that the term oil as i used in the appended claims includes "fat.

What I claim is:

1. Apparatus for the continuous distillation of mixtures of oils or fats and solvents and for deodorizing the resultant oil or fat in a continuous operation, comprising a series of deodorizing chambers, a series or distilling chambers, gaseous fluid conveying means connecting the deodorizing chambers in series from the top of a deodorizing chamber to the bottom of the next preceding deodorizing chamber, gaseous fluid conveying means connecting the distilling chambers in series from the top of a distilling chamber to the bottom of the next. preceding distilling chamber, gaseous fluid conveying means connecting the series 01 deodorizing chambers with the series of distilling chambers from the top of the first of the series oi deodorizing chambersfto the bottom 01 the last of the series of distilling chambers, a pressure regulator and a vacuum pump connected in said last-mentioned gaseous fluid conveying means for maintaining the deodorizing chambers under vacuum, liquid conveying means connecting the deodorizing chambers together in series from the bottom of a deodorizing chamber to the top of the next succeeding deodorizing chamber, liquid conveying means connecting the distilling chambers together from the bottom of a distilling chamber to the top of the next succeeding distilling chamber, liquid conveying means connecting the series of deodorizing chambers with the series of distilling chambers from the bottom of the last of the v series of distilling chambers to the top oi! the first of the series of deodorizing chambers, a liquid flow regulator connected in said last-mentioned liquid conveying means for regulating the flow therein and sealing the vacuum in said deodorizing chambers, means for supplying the mixture to the upper part of the first distilling chamber, means for removing deodorized distillate from the lower portion of the last of the deodorizing chambers,

means for supplying steam to the lower portion of the last deodorizing chamber in direct contact with the liquid therein, and means for removing steam, vapors and odors from the upper portion of the flrst distilling chamber.

2. Apparatus according to claim 1, in which the distilling and deodorizing chambers comprise concentric arrangements of outer hollow cylinders and inner hollow cylinders, means for distributing the liquid to be distilled .or deodorized over the outer surfaces of the inner cylinders, and means for supplying heating fluid to the insides of said inner cylinders. Y

. PHILIPP LORENZ FJAU'I'H. 

